You've got some issues with your configuration. In your zone file, you are trying to resolve IPs 79.99.27.8.1 and 79.99.27.8.2. Obviously, there's no such IPs.

OK, here's how to fix things.

Your zone file can be named normally, rather than backwards. It's just a filename, and doing it the normal way around will make more sense to you later. Even more so when you find yourself maintaining hundreds of zone files one day. So, first step, rename your file to db.79.99.27. Note that I dropped the 8 from the name. The 8 (and the 1 & 2) go into the file itself.

Now, fix the named.conf zone entry to point at the new filename, and to also drop the 8 from the zone.

Now add records to the zone as desired. You also need to add a dot after the names, otherwise the zone name is appended to the end of the name (which is why you only need to put 1 2 8 etc, not 1.27.99.79.in-addr.arpa., which can also do)